Work on the UK's first trials of metropolitan area network (MAN) technology, carried out during 1992, is described. The MAN technology is being used to try a new BT high-speed data service offering known as the switched high-speed data service…
The ultrasonic in-line inspection is one of the important ways to inspect the wall-loss defects on-line for crude oil pipeline. As an integrative device, ultrasonic in-line inspection system contains complex mechanism, electronic instruments and a…